Improvement in stretchers for painters  canvas



UNITED STATES PATENT OEEIOE.

MINER KILBOURNE KELLOGG, OF BALTIMORE, MARYLAND.

IMPROVEMENT IN STRETCHERS FOR PA'INTERS CANVAS.

Specification forming part of Letters Patent No. 69,447, dated October l, 1867.

To all whom fit may concern:

JBe it known that I, MINER KILBOURNE KELLOGG, of Baltimore city, in the State of Maryland, have invented a new and Improved Mode Of Stretching Canvas, or, more exactly, a new means Of spreading a stretcher apart so as to tighten the canvas which covers it.

rlhe nature Of my invention consists in providing a knee tO be placed in the inner angles of a stretcher of every usual form used by artists; and to enable Others skilled in the art to make and use my invention, I will proceed to describe its construction and Operation, reference being had to the accompanying drawings, forming part of this specification.

Figure l represents the knee; Fig. 2, end of shorter side of knee; Fig. 3, screw passing through Fig. 2; Fig. 4, hole tO receive nail or screw in longer side of knee; Fig. 5, point cast upon longer side of knee; Fig. 6, rightangled triangle, solid material, hard; Fig. 7, point on surface Of triangle.

Operation.

Turn the screw No. 3, and separate the two sides of the stretcher.

Make of brass or other sufficiently hard material a knee, 1, having sides of nearly equal lengths, the shorter side having its end 2 turned inward at au angle of forty-five degrees, and through this end a screw, 3, is passed at right angles to its Outer surface, having on its inner head holes to receive an instrument by which it may be turned. The longer side of the knee is perforated by a hole, 4, to receive a screw or a nail, by which the knee is fastened to One side of the inner angle Of the stretcher, and it has one or more points, 5, cast upon its outer surface to secure it from turning. The width of this knee is about Onefourth the length Of its longer side. A solid piece Of metal Or other hard substance, in form `Of a right-angled triangle, 7, is fixed by its itin the exact degree required. The stretcherscrew 7 will retain its place permanently against shaking' in transport, or in spite Of the shrinking Of the stretcher and the stretching of the canvas which time may cause.

The shape of the knee may be so varied as to be applied to any shaped stretcher', such as the Octagon, Oval, &c. x

What I claim as my invention, and desire to secure by Letters Patent, is

The application of a knee and screw to stretchers, by which canvas can be readily kept tight upon its surface,substantially as herein described and represented.

In testimony whereof I have signed my name to this specification in presence of two subscribing witnesses.

MINER K. KELLOGG.

Witnesses JOHN D. BLOOR, JOHN S. HOLLINesHE-AD. 

